but hillary never backed down. >> shame on you, barack obama. >> even when campaigning got ugly. not long after that, clinton welled up at the new hampshire diner and ran away with the primary. another victory. but in the end, she conceded wrapping up her historic presidential bid. >> although we weren't able to shatter that highest, hardest glass ceiling this time. >> but her persistence and passion convinced the man she tried to beat to cast her on the world stage. >> in her, you will have a secretary of state who has my full confidence. >> the former first lady and senator from new york would become madame secretary in 2009. yet now, a million miles and 100 countries later, she finds herself entangled in one final controversy. >> i'm in charge of the state department, 275 posts -- >> reporter: testifying about who knew what when. in light of the attack on the compound in benghazi. but if history is any guide, hillary clinton may emerge unscathed once again and reinvent herself. >> as you saw, hillary clinton came under fire at those benghazi hearings, but gave as good as she g